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Implement MCAsmStreamer::EmitEHSymAttributes. Doing this in the asm streamer

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is a bit ugly, but doing it on the base MCStreamer would be redundant
with the object streamer which does it using SD.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130611 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2011-04-30 16:34:57 +00:00
parent 97f7f4e43d
commit 277abc8172
1 changed files with 31 additions and 3 deletions
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34
lib/MC/MCAsmStreamer.cpp
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@ -47,6 +47,11 @@ class MCAsmStreamer : public MCStreamer {
unsigned UseLoc : 1; unsigned UseLoc : 1;
unsigned UseCFI : 1; unsigned UseCFI : 1;
enum EHSymbolFlags { EHGlobal = 1,
EHWeakDefinition = 1 << 1,
EHPrivateExtern = 1 << 2 };
DenseMap<const MCSymbol*, unsigned> FlagMap;
bool needsSet(const MCExpr *Value); bool needsSet(const MCExpr *Value);
public: public:
@ -118,7 +123,8 @@ public:
} }
virtual void EmitLabel(MCSymbol *Symbol); virtual void EmitLabel(MCSymbol *Symbol);
virtual void EmitEHSymAttributes(const MCSymbol *Symbol,
MCSymbol *EHSymbol);
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag); virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
virtual void EmitThumbFunc(MCSymbol *Func); virtual void EmitThumbFunc(MCSymbol *Func);
@ -278,6 +284,21 @@ void MCAsmStreamer::ChangeSection(const MCSection *Section) {
Section->PrintSwitchToSection(MAI, OS); Section->PrintSwitchToSection(MAI, OS);
} }
void MCAsmStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
MCSymbol *EHSymbol) {
if (UseCFI)
return;
unsigned Flags = FlagMap.lookup(Symbol);
if (Flags & EHGlobal)
EmitSymbolAttribute(EHSymbol, MCSA_Global);
if (Flags & EHWeakDefinition)
EmitSymbolAttribute(EHSymbol, MCSA_WeakDefinition);
if (Flags & EHPrivateExtern)
EmitSymbolAttribute(EHSymbol, MCSA_PrivateExtern);
}
void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) { void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
MCStreamer::EmitLabel(Symbol); MCStreamer::EmitLabel(Symbol);
@ -363,6 +384,7 @@ void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
return; return;
case MCSA_Global: // .globl/.global case MCSA_Global: // .globl/.global
OS << MAI.getGlobalDirective(); OS << MAI.getGlobalDirective();
FlagMap[Symbol] |= EHGlobal;
break; break;
case MCSA_Hidden: OS << "\t.hidden\t"; break; case MCSA_Hidden: OS << "\t.hidden\t"; break;
case MCSA_IndirectSymbol: OS << "\t.indirect_symbol\t"; break; case MCSA_IndirectSymbol: OS << "\t.indirect_symbol\t"; break;
@ -371,11 +393,17 @@ void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
case MCSA_Local: OS << "\t.local\t"; break; case MCSA_Local: OS << "\t.local\t"; break;
case MCSA_NoDeadStrip: OS << "\t.no_dead_strip\t"; break; case MCSA_NoDeadStrip: OS << "\t.no_dead_strip\t"; break;
case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break; case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break;
case MCSA_PrivateExtern: OS << "\t.private_extern\t"; break; case MCSA_PrivateExtern:
OS << "\t.private_extern\t";
FlagMap[Symbol] |= EHPrivateExtern;
break;
case MCSA_Protected: OS << "\t.protected\t"; break; case MCSA_Protected: OS << "\t.protected\t"; break;
case MCSA_Reference: OS << "\t.reference\t"; break; case MCSA_Reference: OS << "\t.reference\t"; break;
case MCSA_Weak: OS << "\t.weak\t"; break; case MCSA_Weak: OS << "\t.weak\t"; break;
case MCSA_WeakDefinition: OS << "\t.weak_definition\t"; break; case MCSA_WeakDefinition:
OS << "\t.weak_definition\t";
FlagMap[Symbol] |= EHWeakDefinition;
break;
// .weak_reference // .weak_reference
case MCSA_WeakReference: OS << MAI.getWeakRefDirective(); break; case MCSA_WeakReference: OS << MAI.getWeakRefDirective(); break;
case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break; case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break;